143 citations · 526 across the 7 of their papers we have counts for
14 papers · 1 filter
Gauge Theories with Time Dependent Couplings and their Cosmological Duals
Adel Awad, Sumit R. Das, Suresh Nampuri +2
We consider the N=4 SYM theory in flat 3+1 dimensional spacetime with a time dependent coupling constant which vanishes at , like . In an analogous quantum mecha…
Gauge Theory Duals of Cosmological Backgrounds and their Energy Momentum Tensors
Adel Awad, Sumit R. Das, K. Narayan +1
We revisit Type IIB supergravity backgrounds with null and spacelike singularities with natural gauge theory duals proposed in {\tt hep-th/0602107} and {\tt hep-th/0610053}. We sho…
On The Stability of Non-Supersymmetric Attractors in String Theory
Suresh Nampuri, Prasanta K. Tripathy, Sandip P. Trivedi
We study non-supersymmetric attractors obtained in Type IIA compactifications on Calabi Yau manifolds. Determining if an attractor is stable or unstable requires an algebraically c…
Black Hole Microstates and Attractor Without Supersymmetry
Atish Dabholkar, Ashoke Sen, Sandip Trivedi
Due to the attractor mechanism, the entropy of an extremal black hole does not vary continuously as we vary the asymptotic values of various moduli fields. Using this fact we argue…
Cosmologies with Null Singularities and their Gauge Theory Duals
Sumit R. Das, Jeremy Michelson, K. Narayan +1
We investigate backgrounds of Type IIB string theory with null singularities and their duals proposed in hep-th/0602107. The dual theory is a deformed N=4 Yang-Mills theory in 3+1…
Time Dependent Cosmologies and Their Duals
Sumit R. Das, Jeremy Michelson, K. Narayan +1
We construct a family of solutions in IIB supergravity theory. These are time dependent or depend on a light-like coordinate and can be thought of as deformations of AdS_5 x S^5. S…